How to Use the Nonogram Solver
Updated: May 23, 2026. Use it for row and column clues from nonograms, Picross, griddlers, and picture logic puzzles.
Enter row clues from top to bottom and column clues from left to right. Put one row or column on each line, and separate multiple clue numbers with spaces or commas.
For example, a clue written as 1 3 means one filled cell, at least one blank cell, then three filled cells. Use 0 for an empty row or column.
Step by step
- Open the Nonogram Solver.
- Copy every row clue from top to bottom, using one line per puzzle row.
- Copy every column clue from left to right, using one line per puzzle column.
- Select Solve puzzle and check whether the result is unique, invalid, or ambiguous.
Reading the result
Filled cells appear dark with a gold outline. Empty cells stay light. If the solver reports multiple solutions, double-check that every clue was copied from the puzzle.
A valid clue set may still have more than one solution when the printed puzzle does not force a unique picture. In that case, use the current result as a logic hint rather than a final answer.
Common input mistakes
The most common mistake is swapping a row clue with a column clue, skipping a blank row, or typing 13 when the puzzle meant 1 3. Keep the original clue grouping intact because spaces separate filled runs.
If the solver says the puzzle is invalid, compare the total filled-cell counts in rows and columns. They should match. If they do not, at least one clue was entered incorrectly.
When to use Picross or no-solution help
Use the Picross Solver when the puzzle source calls it Picross. If the clue set fails or produces multiple answers, read the no-solution guide to find the likely cause.
Common questions
How do I enter blank nonogram lines?
Use 0 on a line when that row or column has no filled cells.
Why can a nonogram have multiple solutions?
Some clue sets do not force a unique grid. Add all row and column clues exactly as printed.